1. Integumentary System Skin function Skin (cutaneous membrane)
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Skin (cutaneous membrane)
Skin function

2. Skin Structure – 2 main layers
Epidermis – outer layer
Stratified squamous epithelium
Dermis
2 layers thick
Figure 4.3

3. Skin Structure
Deep to dermis is the hypodermis

4. Skin of Woman

5. Layers of Epidermis (5) Deep to superficial: Stratum basale
Stratum spinosum
Stratum granulosum
Stratum lucidum
Stratum corneum
(outermost)
(20 – 30 cells thick)

6. Layers of the Epidermis

7. Layers of the Epidermis: Stratum Basale (Basal Layer)
youngest keratinocytes
“germinativum”

8. *Layers of the Epidermis: Stratum Spinosum (Prickly Layer)
Pre-keratin filaments are present

9. LaCrosse, WI !

10. *Layers of the Epidermis: Stratum Granulosum (Granular Layer)
Waterproofing coat accumulates (lamellated granules)

11. *Layers of the Epidermis: Stratum Lucidum (Clear Layer)
Present only in thick, hairless skin

12. Layers of the Epidermis: Stratum Corneum (Corny Layer)

13. Label Me:

14. Dermis (“Hide” – leather)
Two layers
1. Papillary layer
(Meissner’s corpuscle)
Capillary loops
Dermal papillae
2. Reticular layer
Pacinian corpuscles

15. SKIN OF THE FINGER
1 - basal layer of epidermis 2 - prickle cell layer (stratum spinosum) of epidermis 3 - granular layer of epidermis 4 - lucidar layer of epidermis 5 - cornified layer of epidermis 6 - papillary layer of dermis 7 - reticular layer of dermis

16. 5 layers of the epidermis: Dermal layers: